diff options
| author | Frank Li <Frank.Li@nxp.com> | 2024-02-02 10:42:16 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-01 13:41:50 +0100 |
| commit | 9a07244f614bc417de527b799da779dcae780b5d (patch) | |
| tree | 7def19049bd6dcf77f3cba7355c860abe39c2b30 /drivers/usb/cdns3 | |
| parent | d6e31fbd0c5d15759ae199c37b3c58020071f7d6 (diff) | |
usb: cdns3: fixed memory use after free at cdns3_gadget_ep_disable()
commit cd45f99034b0c8c9cb346dd0d6407a95ca3d36f6 upstream.
...
cdns3_gadget_ep_free_request(&priv_ep->endpoint, &priv_req->request);
list_del_init(&priv_req->list);
...
'priv_req' actually free at cdns3_gadget_ep_free_request(). But
list_del_init() use priv_req->list after it.
[ 1542.642868][ T534] BUG: KFENCE: use-after-free read in __list_del_entry_valid+0x10/0xd4
[ 1542.642868][ T534]
[ 1542.653162][ T534] Use-after-free read at 0x000000009ed0ba99 (in kfence-#3):
[ 1542.660311][ T534] __list_del_entry_valid+0x10/0xd4
[ 1542.665375][ T534] cdns3_gadget_ep_disable+0x1f8/0x388 [cdns3]
[ 1542.671571][ T534] usb_ep_disable+0x44/0xe4
[ 1542.675948][ T534] ffs_func_eps_disable+0x64/0xc8
[ 1542.680839][ T534] ffs_func_set_alt+0x74/0x368
[ 1542.685478][ T534] ffs_func_disable+0x18/0x28
Move list_del_init() before cdns3_gadget_ep_free_request() to resolve this
problem.
Cc: stable@vger.kernel.org
Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Acked-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20240202154217.661867-1-Frank.Li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/cdns3')
| -rw-r--r-- | drivers/usb/cdns3/cdns3-gadget.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c index d140010257004..2ae9129214500 100644 --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -2539,11 +2539,11 @@ static int cdns3_gadget_ep_disable(struct usb_ep *ep) while (!list_empty(&priv_ep->wa2_descmiss_req_list)) { priv_req = cdns3_next_priv_request(&priv_ep->wa2_descmiss_req_list); + list_del_init(&priv_req->list); kfree(priv_req->request.buf); cdns3_gadget_ep_free_request(&priv_ep->endpoint, &priv_req->request); - list_del_init(&priv_req->list); --priv_ep->wa2_counter; } |